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A kind of magnetic nano material and its preparation method and application in radioactive element treatment

A magnetic nanometer and magnetic particle technology, applied in the direction of radioactive purification, radioactive pollutants, magnetic/electric field water/sewage treatment, etc., to achieve the effect of recycling

Active Publication Date: 2021-03-26
SUN YAT SEN MEMORIAL HOSPITAL SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnetic nanoparticles have great development prospects in the removal of radioactive nuclear pollution, but some difficulties must be solved in order to realize its application: first, it is necessary to find different specific binding ligands for different radioactive elements; Whether the sex ligand binds well is also an important factor

Method used

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  • A kind of magnetic nano material and its preparation method and application in radioactive element treatment
  • A kind of magnetic nano material and its preparation method and application in radioactive element treatment
  • A kind of magnetic nano material and its preparation method and application in radioactive element treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Synthesis of Magnetic Iron Oxide Nanoparticles (Magnetic Particles)

[0028] FeCl 3 •6H 2 O (2.16g, 8mmol), sodium citrate (C 6 h 5 o 7 Na 3 • 2H 2O) (4.70g, 16mmol) and urea (1.44g, 24mmol) were added to 120mL of distilled water; after stirring, polyacrylamide (1.2g) was added and stirred vigorously with a magnetic stirrer for 1h. The resulting mixed solution was then transferred to a 200 mL Teflon-lined stainless steel autoclave, and kept at 200° C. for 12 hours. The product was then washed several times with ethanol and deionized water, and then captured by a magnetic field to obtain magnetic particles, referred to as Fe 3 o 4 .

[0029] Characterization of Synthesized Iron Oxide Magnetic Particles: From figure 1 A and figure 1 B, it can be seen that the diameter of the magnetic nanoparticles is about 200nm. figure 1 A is a low-resolution TEM image of magnetic iron oxide nanoparticles. It can be found that the middle of the nanoparticles is tran...

Embodiment 2

[0030] Example 2 Magnetic Composite Nanoparticles with a Core-Shell Structure of Nanoscale Sulfur-Wrapped Iron Oxide

[0031] Coating a layer of nano-sulfur on the surface of magnetic iron oxide particles: Dissolve 26.5 mg of sulfur elemental substance in 5 mL of toluene, and add all the dissolved elemental sulfur to 0.1 M iron ferric oxide nanoparticles (prepared in Example 1) toluene solution ( The mass ratio of magnetic particles to sulfur element is 1:8). The resulting mixed solution was heated to 80 °C and kept at this temperature for 30 min. Subsequently, the mixed solution was cooled to room temperature and absolute ethanol was added to precipitate the nanoparticles. Add the precipitated solution into the centrifuge tube and centrifuge (centrifugation condition is 7000 r / min, 10 min). After centrifugation, pour out the supernatant, add n-hexane and absolute ethanol for ultrasonic cleaning. After repeating the above steps three times, excess toluene was added to disso...

Embodiment 3

[0033] Example 3 Magnetic Composite Nanoparticles Modified by Ligand Molecules

[0034] Synthesize ligand molecules that can specifically bind to radionuclides, and perform water-soluble ligand replacement on oil-phase iron oxide nanoparticles: 10 mg dopamine-bisphosphonate is dissolved in 10 ml H 2 O, and the pH value was adjusted to 5; then mixed with 10 mL of nano-iron oxide (2 mg / mL) in hexane (mass ratio of magnetic particles to dopamine-bisphosphonate 2:1), and then treated with ultrasonic waves for 30 minutes . The aqueous phase was then separated and the product was rinsed three times with 10 mL of hexane. Iron oxide magnetic nanoparticles (Fe 3 o 4 -BiP), that is, magnetic nanomaterials. By TEM ( image 3 A) Characterization confirms that the reaction product is indeed iron oxide magnetic nanoparticles with dopamine-bisphosphate ligand.

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Abstract

The invention relates to the technical field of magnetic separation, in particular to a magnetic nanometer material as well as a preparation method thereof and application of the magnetic nanometer material in radioactive element treatment. Based on magnetic nanometer particles, a series of magnetic composite nanometer particles with magnetic ferric oxide nanometer particles as a basis are constructed; at the same time that the size, the morphology and the like of the material are selectively regulated, the magnetic composite nanometer particles with a function of specifically bonding to target radionuclides are obtained through surface modification; the prepared magnetic composite nanometer particles are used for separation and qualitative and quantitative analysis of a sample containingradionuclides; and finally, the magnetic composite nanometer particles are used for treatment of radioactive wastewater, and recycle utilization of the magnetic composite nanometer particles is realized through a series of treatment processes including adsorption, separation, elution and the like.

Description

technical field [0001] The invention relates to the technical field of magnetic separation, in particular to a method for preparing and using magnetic nanomaterials for targeted and efficient separation of radioactive elements. Background technique [0002] Magnetic separation technology uses nano-scale magnetic particles as carriers, and specifically binds target substances by modifying specific ligands on the surface of the magnetic particles. In addition, under the control of an external magnetic field, high-purity target substances can be obtained through a series of operations such as adsorption, enrichment, and elution, and the recyclable use of ionized nanoparticles can be realized. The advantages of magnetic separation include: high processing efficiency, small size of magnetic separation equipment, simple structure, easy maintenance, and relatively low cost. In addition to treating water pollution, the current research on magnetic separation involves many aspects i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K49/08G21F9/12B01J20/00C02F1/48
CPCB01J20/02B01J20/223C02F1/28C02F1/48C02F2101/006
Inventor 潘越毕翔宇
Owner SUN YAT SEN MEMORIAL HOSPITAL SUN YAT SEN UNIV
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